I bought doom 3 on steam for $3 not the bfg one the old 2005 one lol. The game doesn't lag when im walking down hall ways or in cut scenes but as soon as i get shot at or i fire my gun its lags like crazy. i know my current computer is good enought to run the game bc my friend can run it no problem and he has the same laptop. the specs of the laptops are amd e1-1200 4gb and a radeon HD 7310. is there a mod or tweek out there that will help it run smoother?im 2 hours into the game and i wanna finish it please help. i have tried to reinstall the game twice bit that didnt help and i keep my computer running better than my friend. (he doesn't clean it and he doesn't watch what he downloads if that matters) please help its such a good game :D